Research Progress in DOPO⁃based Flame⁃retardant Epoxy Resins

doi:10.19491/j.issn.1001-9278.2020.05.013

Abstract

Abstract:

This paper reviewed the recent research progress in the addition?type flame retardants based on 9,10?dihydro?9?oxa?10?phosphenanthrene?10?oxide (DOPO) for epoxy resins as well as the reactive flame?retardant curing agents involved in the reaction between the P—H bond and the C＝N, C＝O and C＝C bonds. The performance characteristics and relevant mechanisms of each flame?retardant system are summarized. Moreover, the future trend in development of DOPO?based flame?retardant epoxy resins was prospected.

Key words: 9,10?dihydro?9?oxa?10?phosphenanthrene?10?oxide groups, epoxy resin, additive flame retardant, reactive flame?retardant curing agent

CLC Number:

TQ323.5

Zhongying YAO, Yong QIU, Xisheng YANG, Zhen ZHAO, Lijun QIAN. Research Progress in DOPO⁃based Flame⁃retardant Epoxy Resins[J]. China Plastics, 2020, 34(5): 77-86.

Figures/Tables 20

Fig.1. Molecular structure of DGEBA

Fig.2. Molecular structure of DOPO

Fig.3. Reaction scheme of ODOPB?Borate

Fig.4. Molecular structure of DOPO?PEPA

Fig.5. Molecular structure of DSOC

Fig.6. Reaction scheme of HAP?DOPO

Fig.7. Molecular structure of DPT

Fig.8. Molecular structure of DTA

Fig.9. Molecular structure of D?bp

Fig.10. Chemical structure of flame retardant curing agent containing phenolic hydroxyl and Schiff base structure

Fig.11. Chemical structure of flame retardant curing agent containing phosphazene / phenolic hydroxyl and triazine / phenolic hydroxyl

Fig.12. Molecular structure of DPN

Fig.13. Molecular structure of BPD

Fig.14. Molecular structure of DHBAP

Fig.15. Chemical structure of phosphorus?containing flame retardant co?curing agent

Fig.16. Chemical structure of reactive flame retardant curing agent containing phenolic hydroxyl structure

Fig.17. Molecular structure of DOPO?PPO

Fig.18. Molecular structure of dopo?ta

Fig.19. Chemical structure of reactive flame retardant curing agent containing phosphodicarboxylic acid

Fig.20. Molecular structure of TMD

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